Belt-shifter.



L. T. HAGAN.

BELT SHIFTERJ APPLICATION FILED NOV-'1I I914.

Patented Nov. 16, 1915.

4 SHEETS-SHEET I.

COLUMBIA PLANOGRAPH cu.,wAsmNu'roN, D. c.

L. T. HAGAN.

BELT SHIFTER.

APPLICATION FILED Nov. 4. 1914.

1 1 60,88 1 Patented Nov. 16, 1915.

' 4 SHEETS-SHEET 2.

IIOLUMBIA PLANOGRAPH COHWASHINGTON. D. c,

L. T. HAGAN.

BELT SHIFTER.

APPLICATION FILED Nov. 4. 1914.

1 1 60,88 1 Patented Nov. 16, 1915.

4 SHEETS-SHEET 3.

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L. T. HAGAN.

BELT SHIFTER.

7 APPLICATION FILED NOV. 4, I914.

1,160,881. Patented Nov. 16, 1915.

4 SHEETS-SHEET 4- nnrrnn s'rarns" aws. T: H s i; a; redeem. KENTUCKY- snnr-snrrrnn.

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Application fil ed November 4, 1914.

To all whom itmay concern.

Be itv known that. I, LOUIS '17. HAGAN, a citizen of the United States, residing at Winchester, in the county of. Clark. and State of. Kentucky, have invented new and useful Improvements in Belt-Shifters, of which the following isa specification.

My presentinvention relates to improvements in belt shifters. of the type adapted to shift. belts between. stepped cone pulleys, and the primary object of the invention is to provide novel, improved and relatively simplenieans for accomplishing this result quickly and with facility. It is an improvement upon the belt shifter shown and described in my prior. Patent, No. 1,036,487, granted August20,-1912.

To these and other ends, the invention consists in certain I improvements, and combinations and arrangements ofparts; all as will be hereinafter more fullydescribed, the

\ novel. features being pointed out particularly in the claims at theend 0f the. specification. P

In the. accompanying drawings :-Figure 1 is a front elevation of a portion offa machine equipped with belt. shifting mechanism constructed in accordance with the present invention; Fig. 2 isla view of. the same as it appears from the left in Fig. 1; Fig. 3 represents a transverse horizontal section on'theline 33 of. Fig. lgFig. 4; represents a transverse section on the line MofFig. 3; Fig. 5'is a detailfrontelevation ofthe belt shifter; Fig. 6 shows the same as viewed from theleft in Fig. 5-; Fig. 7 1'ep1'esents a section on. the lineZ-T of 3 with parts removedglFigl-8 is a detail sectional; view showing the operating shaft; Fig. 9-is a view similar to'Fig. 1 showinganother. embodiment. of. the. invention; Fig. 10 is an elevation. of theconstruction shown in Fig. 9 asviewed'fro-In the left; Fig. 11 represents a transverse section on the line 11.11, Fig. 9;.nig. 12 is'a front elevation of the belt. shifter shown in Figs. 9 to 11 inclusive; Fig. 18 representsa section on the line 1313 of Fig. 11 Fig. 14 represents a section on the line 11-14:..0f Fig. 11; Fig. 15is adetailfiview, similar to Fig. 8, showing modifiedconstruction eniploying a pair oflrack plates.

Similarparts are designated bythe same reference characters in the several views.

Belt shifters embodying the'present invention are capable of use generallyincon- Specification of Letters Patent.

Patented NovQilfi', 19 115.

Scria1Ho.8'70,273.

nection with machinery of various kinds employing stepped conepulleys. In the, ac.- companying drawings the preferred, embodiments of the invention are shown, but it is to be understood that the invention is not restricted to theprecise constructions shown, as equivalent constructions operating upon the same principle and. capable of accomplishing the same result are contemplated and intended to be covered by the claims at the end of the specification.

In the presentinstance 1 designates a stand.- ard, 2 and. 8 shafts carrying stepped cone pulleys e and 5, power beingtransmitted to the shaft 3 in the present instance by the pulleys 6 .and transmitted at the 'difierent desired speeds to the shaft 2 by the belt 7 passing over the pulleys 4: and 5.

According to the present inventionineans is provided for shifting the belt 7 in either direction axially of the cone pulleys 4: and

5 whereby different speed ratios may beob- V tainedbetween the shafts 2 and 3, andthe present. invention enables this result to. be accomplished'by simple and improved mechanism which can be conveniently located at a point intermediatethe cone pulleys. In the construction shownin Figs. 1 to 8.. inclusive, a fraine. is fixed. to the sjtandard l, the frame comprising a pairof rods 8 and 9,. which are connected at, their ends by the cross members 10 and 11, the cross member 11. being bolted or otherwise secured in fixed position on the standard 1. A pair of, belt guides 12 and 13 areemployed, these belt guideszbeing arrangedto cotiperate with the belt Tin proximity'to the points where the belt passes upon the pulleys i and5 respectively. The belt guide 12 isfixedto a clamp it which. latter is clamped at theproper point longitudinally ofa sleeve 15, the sleeve 15. being. slidable longitudinally onv the rod 8. The other belt guide 13 is secured. by

a clamp 16. to a sleeve 17 which is slidable. longitudinally on the rod 9.; A col lar 18. is attached to one end of. thesleeve 17 by a pin 19 which. maintains the collari18- in proper longitudinal position on the sleeve 17 but permits the necessarydegree of rotationof. the, sleeve; 17, on therod 9 to allow the'belt shifter 13 to. swingtoward. or from its respective cone pulley. according to which section'of the cone. pulley the beltengages. The collar 18 hasQa bracket 2O fixed thereto and the bracket is provided witha vertical slot 21. A. collar 22 similar I permits the necessary rotation of said sleeve wherebythe belt shifter 12 may adjust itself according to whichparticular section of the respective cone pulley is engaged by the belt.

A bracket 23 is fixed to the collar and provided with a vertical slot 24. Aframe 25 spans the rods 8 and Sland has bearings 26 and 27 which are slidable longitudinally on V This frame'25 also has an extended bearing 28 which 18 shdable lon'gr' said rods.

tudinally on the sleeve 17.1 An operating shaft 29 is journaled in the frame and is providedat one end with a crank disk 30 having a pair vof'pins 31 and 32 projecting from the face thereofwhilethe opposite end of the shaft 29 is provided with a crank 33 having a crank pin 34. The crank spin 34 operates in the vertical slot 24 of the bracket 23 while'the pin 32, on the disk 30, which is longer'than the pin 31, operates in the vertical slot 21 of the bracket 20. Anoperating handle is slidably' connectedto the shaft 29. In the present instance the handle 35 is connected toan extension of the crank pin A toothed bar or rack 36' is secured in fixed relation to the frame composed of. the rods 8 and 9 and cross members 10 and 11, it being secured in the present instance, to arms 37 and 38 which are extended from the cross members 10 and 11,;and thi'stoothed 'bar' or rack is formed with longitudinally spaced slots or recesses 39 which are adapted I f to receive the pins 31 and 32 on the disk 30 as the shaft 29 is rotated,

In operation, one revolution ofjthe crank 35 and the shaft 29 to which" it isconnected serves to shift the belt from "one section of that the belt is first shifted. from a section oflarger diameter to oneofsmaller diameter on the appropriate pulley and the belt is afterward shifted from the section of smaller diameter to the next section of larger diameter on the other cone pulley.

F or example, inorder to, shiftthe belt the'left one step the crank 35 is turned one revolution in a left-hand direction. During the first half revolution of the crank, the crank pin 32 works idly in a slot of the toothed bar 36 and the slot 21 of thebracket 20 and, consequently, the belt shifter 13 will remain stationary but the crank pin 34 will operate in the slot 24 of the bracket 23 and will shift the belt guide 12 to which it is connected one step to the left, thereby transferring the belt from a section of larger diameter to the neXt section of smaller diameter to the left on the pulley 4 When the first half revolution of'the shaft'29 is completed, continued rotation of the shaft causes the j crank pin 31' to leave one slot in the toothed bar 36 topass over the shaft 29 and engage a slot in the bar 36 beyond that engaged by the pin 32, and during this movement the bracket 20' engaged by the pin 32 will be shifted one step toward the left, carrying with it the belt guide 13130 which it is con nected, thereby transferring the belt from a section'of smaller diameter to the next adjacent one of larger diameter on the pulley 5, the belt guide 12 remaining stationaryduring the shifting'of the belt guide 13. In this manner, the belt can be shiftedto any desired position to the left by turning the crank 35 in a left-hand direction, and to any position to the right by rotating the crank .35 in a reverse or right-hand direction; Instead of using a single rackbar, a pair of rack bars 3Y6 and'36 may beused, as shown in Fig. 15, theshaft 29 having its crank pins 32* and 34 set in diametrically opposite relation and alternately engaging the respective rack .bars.

In theconstruction shown in Figs. 9 to 14 incluslve, another embodiment of the invention is shown applied to a structure similar to that shown in Figs. 1 to 8*inclusive. In this instance, a frame is provided which embodies a pair of guide bars 40 and .41 which are connected by the cross members.

W143, the ross member 43, being fi ed to the standard '1 at apoint betweenthe stepped cone pulleys 4 and 5.: A pair of upper and lower belt guides 44 and 45 are provided which are similar to the belt guides 12 and 13, these belt guides being fixed upon rods 46 and 47. A pair of slides 48 and 49 are mounted longitudinally on the bars 40 and 341 and support and 1 are operatively 'connected'to the rods 46 and 47.

The slide 48 is formed with a slot 50 and the slide 49 with a slot 51. A frame 52 is; guided to move freely in a longitudinal direction relatively to the'bars 40 and 41 and supports an operating shaft 53, the latterhaving a.

crank 54 one end provided with a crank. p n 55 which operates in the slot 50 of the slide 48, and a disk 56 is fixed tothe opposite end of the shaft 53 and is provided with at pair: of pins 57 and 58 adapted to co r 'eratelwith a series of longitudinally spaced slots 59 formed in a toothed bar or rack 60=' whichrlatter is secured to the bar 41. The

pin .58 also operates in the slot 51 of the slide 49, the pin 57 being shorter and opcrating only in the slots or notches of the,

45 being alternately shifted one step, either to the right or to the left, according to the direction of the operating shaft, and cans mgthebelt. to be 'first transferred from a section of larger diameter to one of smaller diameter on one cone pulley and subsequently transferred from acone section of smaller diameter to the next one of larger diameter on the other cone pulley.

The present invention provides a belt shifter which enables a belt to be shifted quickly and with certainty on stepped cone pulleys, and the construction is relatively simple and capable of being applied easily to a machine, and when applied it'is compact and in a position where it will not interfere with other parts of the machine or with the manipulation thereof.

I claim as my invention 1. In a belt shifter, the combination with a pair of stepped cone pulleys, and a belt cooperative therewith, of a pair of belt shifting guides for the respective pulleys, a frame located between the pulleys, slides movable on said frame and operatively connected to the respective belt guides, a rack bar, and an operating shaft operatively connected to the respective slides and cooperative with said rack bar to alternately shift the belt guidesin the same direction, the movement of one guide being in advance of the movement of the other guide.

2. In a belt shifter, the combination with a pair of stepped cone pulleys, and a belt cooperative therewith, of a pair of belt shifting guides for the respective pulleys, a frame located between the pulleys, slides movable on said frame and operatively connected to the respective belt guides, a rack bar, a member reciprocable on said frame, an operating shaft supported by said member and operatively connected to the respective slides and cooperative with said rack bar to alternately shift the belt guides in the same direction. I

3. In a belt shifter, the combination with a pair of stepped cone pulleys, and a belt cooperative therewith, of a pair of belt shifting guides for the respective pulleys, a frame located between the pulleys, slides movable on said frame and operatively connected to the respective belt guides, a rack bar, and an operating shaft having a crank cooperative with one of said slides, and another crank having a pair of pins both of which cooperate with the rack bar and one of which cooperates with the other slide.

4:. In a belt shifter, the combination with a pair of stepped cone pulleys, and a belt thereto, a rack bar, and an operating shaft having a crank cooperative with the slotted portion of one slide and a pair of crank pins, one pin cooperating with the slotted portion of the other slide and also with the racllr, and the other pin cooperative with the rac r.

5. In a belt shifter, the combination. with a pair of stepped cone pulleys, and a belt connecting them, of a pair of belt shifting guides for said pulleys, a supporting frame, a pair of slides reciprocable on the frame and pivotally supporting the belt guides to swing toward and from the respective pulleys, and means connected to said slides for shifting them.

6. In a belt shifter, the combination with a pair of stepped cone pulleys, and a belt cooperative therewith, of a pair of belt shifting guides for the respective pulleys, a frame having slides movable thereon and operatively connected to the respective belt guides, an operating shaft connected to the respective slides, and rack means cooperative with said shaft for causing alternate shifting of the belt guides in the same direction and one in advance of. the other.

In testimony whereof I have hereunto set my hand. in presence of two subscribing witnesses.

LOUIS T. HAGAN.

Witnesses:

LEE Evans, W. J. BURK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

